Furnace.



F. J. PIOCH.

FURNACE.

APPLICATJON FILED Aue.al. I914.

2 SHEETS-SHEET Patented Aug lHll WITNESSES:

F. J. PIOCH.

FURNACE.

APPLICATION FILED AUG-31.1914.

1,150,451. Patented Aug. 17, 1915.

2 SHEETSSHEET 2.

WITNESSES:

CDLUMEIA PLANDORAPH C0.,WASHXNUTON, n. c

FRANK J. PIOCH, OF SAN FRANCISCO, CALIFORNIA.

FURNACE.

Specification of Letters Patent.

Patented Aug. 17,

Application filed. August 31, 1914. Serial No. 859,345.

To all whom, it may concern:

Be it known that I, FRANK J. PIOCH, a citizen of the United States, residing in the city and county of San Francisco and State of California, have invented new and useful Improvements in Furnaces, of which the following is a specification.

This invention relates to a center draft furnace for burning coal or wood. I

It is one of the objects of the present invention to construct a simple, durable center draft furnace which is provided with a special draft hood or bathe plate attachment by which the heat and flames frcm the fire will be equally distributed over the heating surface of the furnace. V 7

The invention consists of the parts and the construction and combination of parts as hereinafter more fully described and claimed, having reference to the accompanying drawings, in which I Figure 1 is a vertical central section. Fig. 2 is a plan section on line 22, Fig. 1.

A indicates the main body of the furnace. This is cylindrical in shape and is secured, at its lower end, to a flange-shaped ring 2. Supported by lugs 3, on the inner edge of said ring, is an ash pan i which is provided with an upturned annular flange 5, and secured to said flange and concentrically positioned within the main body is an inner cylindrical shaped casing 6. This casing 6 is centrally divided by grate bars 7 of suitable construction' to form a fire pot 8 and ash pit 9. The fire pot may be lined with a suitable form of refractory material 10 which not only prevents the casing 6 from burning out, but also serves to retain the heat after the fire has burneddown. Fuel is admitted to the fire pot through a door 11 and the ashes are removed from the pit 9 through a lower door 12. Both doors are provided with registers through which air is admitted to support combustion.

Adjustably secured to the upper end of the body A is a conical shaped head 13, and adjustably secured to the lower edge of the body A is a similar shaped bottom section 14. Both the head and bottom sections are provided with outlet openings at 13 and 14 by which connection is made with a smoke flue 15. The lower end of the pipe 15 is formed in the shape of a T and is provided with a check damper 16 which may be partly opened to regulate the draft of the furnace or fully opened when it is desired to clean out the soot and like accumulations from the base section of the furnace. The upper end of the pipe 10 may be connected by a pipe section 17 with a chimney in the usual manner and a direct da mper 18 is provided at the upper end of the head 13 for purposes hereinafter to be described.

In operation, any. suitable fuel, such as wood or coal, may be inserted into the iii-e pot 8 and ignited in the usual manner. The register on the lower door 12 is then partly opened and the air is admitted in the direction of arrow a into the ash pit where it is permitted to pass up through the grate bars to the burning fuel. The escaping gases of combustion, together with the flame, will then pass up over the edge of the fire pot in the direction of arrows b and pass ClOW11-, wardly through the annular space 19 formed between the body A and inner casing section 6 and is finally permitted to escape through the outlet 1% and smoke flue 15 with connection 17 to the chimney.

For the purpose of equally distributing the heat and flame discharged over the edge of the fire pot so as to obtain uniform heat throughout the furnace and also to prevent any surface or part from being unduly exposed to the heat a deflecting hood or baiiie plateQO has been provided. This hood or bafiie is pivotally secured, as at 21, to the lower side of the ash pan and is shaped substantially as shown in Figs. 1 and 2. The downwardly projecting flange 2:2, formed on the deflector, is cut on an angle, as at 23, and directs the heat and flame coming down through the annular space 19 into the outlet lt and smoke flue 15. In other words, it will prevent the heat from taking the shortest path which would be that indicated by arrow 0. The angular shape of flange 22 increases the distance so as to equally distribute the heat throughout the annular passage.

It often happens, when installing furnaces, that the connection 17, between the chimney and flue 15, projects at such an angle that it is necessary to employ elbows. This is overcome in the present instance as the head and bottom sections 13 and 14, with connected flue 15, may be turned to any suitable angle with relation to the body A, thus eliminating the use of purpose.

It some times occurs that the flue connec tion is disposed in acute angular relation elbows for this same can be turned so as to properly aline the upper end of the flue with the con-' fuel.

to the wall provided with the flue, but by rotatably mounting the parts 13 and 14 the nector.

The head and bottom sections are prefer} ably secured together by tie rods, when the correct position is secured, to form a tight joint and prevent the escape or leakage of gases from the combustion chamber of the furnace, and the whole inner structure may be supported by brackets 2% secured 'to the lower base section 14.

1 The construction of a furnace on the principles here shown permits the use of doors which are sufficiently elevated from the base or support to prevent excessive stooping when cleaning out the ash pit or inserting The provision of the direct damper l8 prevents the escape of smoke or flame through the door 11, when fuel is being sup-- plied to the fire pot, as the opening of the direct damper, by means of the rod 25 and the crank arm connection 26, permits the smoke and flame to escape directly into the connection 17' and the chimney. The draft I control of the furnace is ideal as it may be controlled from the registers in both the upper and lower door and by the check damper 16 and direct damper 18.

The combustion chamber proper is surrounded by a jacket 27 to which the air to be heated is admitted near the bottom in the usual manner through openings 28. The air admitted through the openings 28 will gradually heat and rise up around the combustion chamber and is finally permitted to escape through the discharge openings 29, with connected flues, to the rooms'or other places to be heated;

The materials and finish of the several parts of the furnace are such as the experience and judgment of the manufacturer may 7 dictate. 1

Having thus described my invention, what I claim and desire to secure byLetters Patent is v r In a furnace, an outer casing having a bottom, a cylinder within the casing, said cylinder being closed at its bottom and open at its top and having a fire pot and ash pit, the sides and bottomofthe cylinder being spaced from the sides and bottom of the outer casing respectively, a flue communicating with the space between the casing and cylinder bottoms, and a deflector formed independent of the furnace bottom and hav-r ing a top pivotally secured to the furnace bottom and having downwardly extending spaced side flanges inclined from the inner end of the deflector downwardly to, and with the top, terminating at the points where the flue communicates with the space between the casing and cylinder bottoms, the outer ends of the flanges and top extending across the space between the casing and cylinder sides.

In testimony whereof I have hereunto set my hand in the presence of two subscribing witnesses. I

FRANK J. PIOCI-I.

Witnesses 7 Joe. F. BYRNE I. H. MCOARTY.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Eatents, Washington, D. G. v l l i 

